Yesterday, I wrote this post summarizing my tenth grade sister's observations about how her friends are using technology. Do you have any relevant anecdotes to share from your own children or relatives (of any age)?
Related, should founders care if adolescents are (or are not) using their products? Sure, they drive a lot of growth and engagement if they are, but they're not necessarily the most loyal (or wealthy) bunch of customers. Is it the end of the world that Twitter can't attract children, for example?